Refer to the figure below. The figure shows a signal transduction pathway in a cell.How does adenylyl cyclase become activated so that it can relay the signal during a signal transduction event in this particular pathway?
A) It becomes phosphorylated.
B) It becomes dephosphorylated.
C) It binds ATP.
D) It changes conformation.
E) It is hydrolyzed.

Question

Refer to the figure below.  The figure shows a signal transduction pathway in a cell.How does adenylyl cyclase become activated so that it can relay the signal during a signal transduction event in this particular pathway?
A) It becomes phosphorylated. 
B) It becomes dephosphorylated. 
C) It binds ATP. 
D) It changes conformation. 
E) It is hydrolyzed.

Quizplus · Accepted Answer

The figure shows that the activation of a G protein-coupled receptor leads to the activation of the G protein, which in turn activates adenylyl cyclase. This activation of adenylyl cyclase is achieved through a conformational change triggered by the binding of the G protein. Therefore, the correct choice is D.

Refer to the Figure Below